双作用滑块型双定子马达内漏特征与优化

为了准确计算双作用滑块型双定子马达的容积效率以及获得合理的密封缝隙尺寸,基于马达的内部结构,对其内部各种缝隙存在的泄漏进行了详细的分析,得出马达内部泄漏可分3类,泄漏途径有10种.通过建立各泄漏途径的流量数学式,得到马达在普通连接和差动连接两种连接形式下的总泄漏量模型.研究结果表明:双作用滑块型双定子马达的泄漏情况不但与自身的结构参数有关,而且与工作压力以及输出转速正相关,其泄漏量随着马达进出油口连接方式的改变而改变,但总泄漏量遵循一个共同的规律.结合实例进行数值分析,研究了制约双作用滑块型双定子马达不适宜应用在中高压场合的主要因素,得出轴向泄漏在总泄漏中所占比重最大;同时,研究了轴向泄漏随缝隙变化的规律,为合理优化双作用滑块型双定子马达结构提供了依据.

Characteristics of internal leakage in double acting double stator slider motors and optimization

The internal leakage pathways in a double acting double stator slider motor were analyzed according to its internal structure detailed in order to calculate its volumetric efficiency precisely and subsequently to determine reasonable clearances for the seals. It was identified that there are three kinds of internal leakages and ten leakage pathways in the motor. The total leakage model was obtained when the motor was in ordinary connection or in differential connection modes through the combination of leakage flow rate expression of every leakage pathway. The results show that the internal leakage flow rate in the motor is related not only to itself structure parameters, but also to the working pressure and the output speed; moreover, the flow rate is dependent of connection mode of ports. However, the total leakage flow rate follows a common rule. An analysis was applied into a particular motor to identify the main factor that restricts a double acting double stator slider motor can be used in a high pressure situation. It was found that the axial leakage is the main factor because it is mostly substantial. Finally, effects of clearance on axial leakage flow rate were explored to tend to provide useful information for optimizing the structure of double acting double stator slider motor.